Rosa spithamea S.Watson

Ground rose (en)

Species

Angiosperms > Rosales > Rosaceae > Rosa

Characteristics

Subshrubs, forming open colonies. Stems erect, 1–5(–10) dm, openly branched; bark dark reddish brown, glabrous; infrastipular prickles paired, erect to slightly curved, largest sometimes ± flattened, subulate, 2–8(–12) × 2–5 mm, ?base glabrous?, internodal prickles absent or sparse to dense, mixed with aciculi, aciculi sometimes absent, stipitate-glandular or eglandular. Leaves 3–10 cm; stipules 6–15 × 1.5–2.5(–3.5) mm, auricles flared to ± erect, 1.5–6 mm, margins entire, stipitate-glandular, surfaces glabrous, eglandular; petiole and rachis with pricklets, usually glabrous, rarely finely hairy, stipitate-glandular; leaflets 5–7(–9), terminal: petiolule 3–13 mm, blade ovate-elliptic, sometimes obovate-elliptic, 10–30 × 8–20 mm, membranous to ± leathery, base obtuse, margins ± 2-serrate, teeth 8–20 per side, acute to obtuse, gland-tipped, apex obtuse to ± truncate, abaxial surfaces pale green to green, glabrous, sometimes sparsely hairy, sessile-glandular or eglandular, adaxial green, dull, rarely sparsely hairy. Inflorescences corymbs, 1–10-flowered. Pedicels erect, slender to stout, 2–15 mm, glabrous, rarely finely pubescent, stipitate-glandular, sometimes setose-glandular; bracts 1 or 2, lanceolate, 2–15 × 1.5–5 mm, margins entire, stipitate-glandular, surfaces glabrous, eglandular. Flowers 2.5–3.8 cm diam.; hypanthium ± ovoid, 3–6 × 2.5–5 mm, glabrous, sparsely to densely stipitate-to setose-glandular, rarely eglandular, neck 0.5–1 × 2.5–4 mm; sepals spreading, ovate-lanceolate, 8–15 × 2.5–3.5 mm, tip 0–4 × 1.3 mm, margins entire, abaxial surfaces glabrous, stipitate-glandular; petals single, deep pink, 12–23 × 15 mm; carpels 15–30, styles exsert 1 mm beyond stylar orifice (2 mm diam.) of hypanthial disc (3.5 mm diam.). Hips scarlet, ± depressed-subglobose, 7–15 × 7–15 mm, fleshy, glabrous, sparsely to densely stipitate-to setose-glandular, rarely eglandular, neck 0.5–2 × 2–5 mm; sepals persistent, erect. Achenes basiparietal, 4–17, cream to pale brown, 3.5–5 × 2.5–3.5 mm. 2n = 14.
Life form perennial
Growth form shrub
Growth support free-standing
Foliage retention deciduous
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Photosynthetic pathway c3

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Usage

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Cultivation

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Germination duration (days) 30 - 365
Germination temperacture (C°) 12
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Images

Rosa spithamea unspecified picture

Distribution

Rosa spithamea world distribution map, present in United States of America

Identifiers

LSID urn:lsid:ipni.org:names:734316-1
WFO ID wfo-0001014481
COL ID 798GK
BDTFX ID -
INPN ID -
Wikipedia (EN) Link
Wikipedia (FR)

Synonyms

Rosa granulata Rosa spithamea Rosa spithamea var. solitaria Rosa spithamea var. spithamea

Lower taxons

Rosa spithamea var. sonomensis